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This commit is contained in:
Dmitry Boulytchev 2020-09-01 06:20:39 +03:00
parent 6f72275cfa
commit 81be668d4e
2 changed files with 7 additions and 2 deletions
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7
stdlib/Ostap.lama
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@ -43,7 +43,12 @@ public fun memo (f) {
if log then printf ("Applying memoized parser to %s\n", s.string) fi;
case findMap (deref (t), s) of
None ->
t ::= addMap (deref (t), s, [addSet (emptySet (compare), k), emptySet (fun (r1, r2) {case [r1, r2] of [Fail (_, _, _), Fail (_, _, _)] -> 0 | _ -> compare (r1, r2) esac })]);
t ::= addMap (deref (t), s, [addSet (emptySet (compare), k), emptySet (fun (r1, r2) {
case [r1, r2] of
[Fail (_, _, _), Fail (_, _, _)] -> 0
| _ -> compare (r1, r2)
esac
})]);
f (fun (r) {
r := lookupMemo (restab, r);
if log then printf ("Running continuation with result %s\n", r.string) fi;